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Articles 31 - 35 of 35
Full-Text Articles in Structural Biology
Micro-Spectroscopy Of Bio-Assemblies At The Single Cell Level, Jeslin Kera
Micro-Spectroscopy Of Bio-Assemblies At The Single Cell Level, Jeslin Kera
Honors Undergraduate Theses
In this thesis, we investigate biological molecules on a micron scale in the ultraviolet spectral region through the non-destructive confocal absorption microscopy. The setup involves a combination of confocal microscope with a UV light excitation beam to measure the optical absorption spectra with spatial resolution of 1.4 μm in the lateral and 3.6 μm in the axial direction. Confocal absorption microscopy has the benefits of requiring no labels and only low light intensity for excitation while providing a strong signal from the contrast generated by the attenuation of propagating light due to absorption. This enables spatially resolved measurements of single …
The Role Of Gln146 To The Stability And Activity Of Manganese Superoxide Dismutase, Ting Wang
The Role Of Gln146 To The Stability And Activity Of Manganese Superoxide Dismutase, Ting Wang
Theses and Dissertations--Chemistry
Gln146 is a highly conserved outer-sphere amino acid residue at the active site of MnSOD. It serves as a hydrogen bond donor to both the solvent molecules at the active site and Tyr 34, the conserved “gateway” amino acid residue. This dissertation develops our understanding of the effect of amino acid Gln146 at the second shell of the active site of metalloprotein MnSOD in facilitating metal binding, the modulation of redox potential, and the optimization of catalytic activity and structure stability. Different from the wild-type MnSOD, Q146E is always purified as a completely apo-protein with zero active metal ion and …
Engineering An Alkane-Hydroxylating Bacterial Monooxygenase: A Tale Of Two Chemistries, Arjun Nanda
Engineering An Alkane-Hydroxylating Bacterial Monooxygenase: A Tale Of Two Chemistries, Arjun Nanda
Pomona Senior Theses
Toluene / o-xylene monooxyenase (ToMO) from Pseudomonas sp. OX1 is a multimeric metalloenzyme enzyme that efficiently catalyzes the hydroxylation of aromatic hydrocarbons with high specificity. Though included in a larger group of conserved bacterial multicomponent monooxygenases (BMMs) studied as potential biocatalysts for industrial hydrocarbon chemistry, the substrate specificity and oxygenated intermediates of ToMO differ greatly from its well-characterized, alkane-hydroxylating analog sMMO. Despite a shared global topology and near identical active sites, sMMO can cleave inert C-H bonds in alkanes while ToMO cannot - two seemingly similar structures give rise to vastly different chemistries. This work seeks to determine a structural …
Biochemical Analysis Of Putative Single-Stranded Nucleic Acid Binding Proteins In Porphyromonas Gingivalis, Steve H. Kokorelis
Biochemical Analysis Of Putative Single-Stranded Nucleic Acid Binding Proteins In Porphyromonas Gingivalis, Steve H. Kokorelis
Theses and Dissertations
Proteins that bind to both DNA and RNA embody the ability to perform multiple functions by a single gene product. These nucleic acid binding proteins in prokaryotes can play a vital role in many cellular processes, including replication, transcription, gene expression, recombination, and repair, to name a few. Nucleic acid binding proteins have unique functional characteristics that stem from their structural attributes that have evolved in a widely-conserved manner. In Escherichia coli (E. coli), the highly-conserved histone-like protein, HU, which predominates as a heterodimer of HUα and HUβ, has been found to bind to both dsDNA and ssDNA. …
Vegetable And Fruit Intake And Fracture-Related Hospitalisations: A Prospective Study Of Older Women, Lauren C. Blekkenhorst, Jonathan M. Hodgson, Joshua R. Lewis, Amanda Devine, Richard J. Woodman, Wai H. Lim, Germaine Wong, Kun Zhu, Catherine P. Bondonno, Natalie C. Ward, Richard L. Prince
Vegetable And Fruit Intake And Fracture-Related Hospitalisations: A Prospective Study Of Older Women, Lauren C. Blekkenhorst, Jonathan M. Hodgson, Joshua R. Lewis, Amanda Devine, Richard J. Woodman, Wai H. Lim, Germaine Wong, Kun Zhu, Catherine P. Bondonno, Natalie C. Ward, Richard L. Prince
Research outputs 2014 to 2021
The importance of vegetable and fruit intakes for the prevention of fracture in older women is not well understood. Few studies have explored vegetable and fruit intakes separately, or the associations of specific types of vegetables and fruits with fracture hospitalisations. The objective of this study was to examine the associations of vegetable and fruit intakes, separately, and specific types of vegetables and fruits with fracture-related hospitalisations in a prospective cohort of women aged ≥70 years. Vegetable and fruit intakes were assessed at baseline (1998) in 1468 women using a food frequency questionnaire. The incidence of fracture-related hospitalisations over 14.5 …